A seronegative oligoarthritis that develops 2-6 weeks after an infection, usually genitourinary or gastrointestinal infection

Peak age 15-25, males>females. Associated with HLA B27

Joint swelling, dactylitis, circinate balanitis, keratoderma blennorrhagica

Urethritis, Conjunctivitis, and Arthritis plus malaise and fever, low-back pain and heel pain is common because of enthesopathies at the Achilles tendon

Bloods: FBC, U&E, ESR, CRP, Rheumatoid Factor

Microbiology: Urine and vaginal/urethral swabs for chlamydia, stool culture

Joint Aspiration: To rule out crystals or septic arthritis

Conservative: Rest

Medical: NSAIDs, Intra-articular or oral steroids, antibiotics to treat underlying

infection. DMARDs may be useful for chronic cases.

May run a chronic/relapsing course 

70% fully recover within 6 months